This world is all about seeing dreams otherwise the real condition is quite unbearable..
Images Sources : taken by me
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It is better to remain unaware of things that may otherwise cause you stress.. if you don't know about something, you don't get worried about it.
If you know that enlightening someone about the true nature of events will eventually make someone, a pessimist then Do not ever shatter their illusion that was making them happy in their fantasies all that time.
This is how ignorance becomes a bless